Non-uniform quantizers with SC polar based channel-optimized decoders

Publication

Publication

In this paper, we present a nonuniform quantizer based on the condition of maximum information rate achieved over uncorrelated Rayleigh fading channel and when successive cancellation (SC) decoding algorithm of polar codes is applied. Based on symmetry condition of random variables, we start with theoretical model where uniform scaling factors are applied to correct soft messages at the absence of channel state information (CSI) at the receiver side. The searching method followed to find the required optimal factor stayed away from using exhaustive search methods. Numerical results show how non-uniform quantized polar decoder is capable to perform performance close to floating point performance.